desaikomal commented on code in PR #2199:
URL: https://github.com/apache/helix/pull/2199#discussion_r951773009
##########
helix-core/src/main/java/org/apache/helix/common/caches/BasicClusterDataCache.java:
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@@ -217,6 +218,23 @@ public void requireFullRefresh() {
}
}
+ /**
+ * Update cache and return true if any local data is changed compared to
before refresh.
+ * @param dataAccessor the data accessor used to fetch data.
+ * @return true if there is a change to local cache.
+ */
+ public boolean updateCache(HelixDataAccessor dataAccessor) {
+ Map<String, LiveInstance> liveInstance = new HashMap<>(getLiveInstances());
+ Map<String, ExternalView> externalView = new HashMap<>(getExternalViews());
+ Map<String, InstanceConfig> instanceConfig = new
HashMap<>(getInstanceConfigMap());
+ requireFullRefresh();
+ refresh(dataAccessor);
+
+ return !(liveInstance.equals(getLiveInstances())
Review Comment:
but snapshot is taken just few cpu cycles before on line-227
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